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Lindcott Armory

Rifle · Proprietary

.500 Jeffery

Also known as 12.7x70mm Schuler · .500 Schuler · 12.7x70mmRB

One of the most powerful bolt-action dangerous-game cartridges of the interwar era.

Caliber
0.5098″ · 12.95 mm
Introduced
1920
Case
Rebated Rimless
Primary use
Hunting
Status
Active

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Velocity2,350–2,500 fps
Energy6,560–8,100 ft·lb
Identity
Introduced
1920
Type
Rifle
Origin
Germany
Inventor
August Schüler
Manufacturer
W. J. Jeffery & Co.
Standard
Proprietary
Status
Active
Availability
Scarce
Build
Twist (typical)
1:15
Primer
Large Rifle Magnum
Case type
Rebated Rimless
Pressure & range
Max pressure
55,000 psi
Eff. range
100 yd
Max range
1000 yd
Recoil
75–95 ft·lb

Ballistics

Representative trajectory · velocity only, no drag model · 100 yd zero0–800 yd
-160" -140" -120" -100" -80" -60" -40" -20" 0" Line of sight 0 yd 100 yd 200 yd 300 yd 400 yd 500 yd 600 yd 700 yd 800 yd 100 yd zero 156″ drop @ 800 yd
Drop Zero

Velocity only, no drag model: no published ballistic coefficient is on file for .500 Jeffery, so this is the shape gravity alone gives the advertised velocity. Drag would steepen it. The tool below solves real loads through their published G1 or G7 model.

Open in Ballistic Compare
Parent case
—

Representative trajectory — modeled from a single velocity input (no published BC for this cartridge yet).

Dimensionscase measurements · scale drawing · size vs familiar rounds

Case dimensions — the scale drawing at the top of the page is built from these.

CIP TDCC · verified
Measuremmin✓
Bullet ⌀ 12.950.510 ✓
Neck ⌀ 13.670.538 ✓
Shoulder ⌀ 15.420.607 ✓
Shoulder angle 12.6°— ✓
Base ⌀ 15.720.619 ✓
Rim ⌀ 14.610.575 ✓
Belt ⌀ n/a
Rim thickness 1.320.052 ✓
Neck length 8.330.328 ≈
Case length 69.852.750 ✓
Overall length 88.093.468 ✓

Size vs familiar rounds

Drawn at true 1:1 — every case is accurate relative to the others. Absolute size depends on your screen's pixel density, so measuring one against a real ruler may be off. .500 Jeffery is highlighted below.

Reloading costestimate cost per round vs factory

Estimate your cost per round and how it compares to factory. Inputs are yours — nothing is stored.

Cost estimate only — not load data. Charge weight is your input; follow published manuals for safe charges.

Firearms chambered in .500 Jeffery

12 models in the database chamber .500 Jeffery. Browse all →

Blaser R8 Safari .500 JefferyBlaser Blaser R8 .500 Jeffery 25.6-inchSauer & Sohn 405 .375 H&HBlaser R8 Professional .416 RigbyBlaser R8 .375 H&H Mag 25.75-inchBlaser Blaser R8 .375 H&H 23.6-inchSako Sako 85 Safari .500 Jeffery 24.4-inchBlaser R8 Safari 375 H&HHeym Heym SR21 .500 Jeffery 24-inchHeym Heym SR21 .375 H&H 24-inchJohn Rigby & Company Big Game .500 Jeffery 24-inchJeffery Bolt Action .404 Jeffery

Connected reference

FirearmsFirearms in .500 JefferyToolCompare ballistics

History

Schüler designed the round to bring .505 Gibbs-class stopping power into the 1898 Mauser action already used for the 7×57 and 8×57. Jeffery adopted and rebranded it for the British sporting market after WWI. Its rebated rim — larger case body than rim — let a big-bore cartridge work through a standard magnum bolt face, though it demands careful feeding.

FAQs

What twist rate does .500 Jeffery use?
.500 Jeffery typically uses a 1:15 twist rate.
What bullet diameter is .500 Jeffery?
.500 Jeffery uses a 0.5098″ (12.95 mm) diameter bullet.
Is .500 Jeffery still in production?
.500 Jeffery is active; typical availability is scarce.
What is .500 Jeffery used for?
.500 Jeffery is primarily used for hunting.

Sources & provenance

Data & sources. Specs compiled from the Lindcott Armory reference; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →